package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;


    /**
     * 统计某个时间段的营业额
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> deteList = new ArrayList<>();
        deteList.add(begin);
        while(!begin.equals(end)) {
            begin = begin.plusDays(1);
            deteList.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : deteList) {
            LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime= LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("beginTime", beginTime);
            map.put("endTime", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover =turnover==null ? 0.0: turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO.builder()
                .dateList( StringUtils.join(deteList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 统计某个时间段的用户数量
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> deteList = new ArrayList<>();
        deteList.add(begin);
        while(!begin.equals(end)) {
            begin = begin.plusDays(1);
            deteList.add(begin);
        }
        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : deteList) {
            LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime= LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("beginTime", beginTime);
            Integer totalUserNumber=userMapper.countUser(map);
            totalUserList.add(totalUserNumber);
            map.put("endTime", endTime);
            Integer newUserNumber=userMapper.countUser(map);
            newUserList.add(newUserNumber);
        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(deteList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /**
     * 统计某个时间段的订单数据
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> deteList = new ArrayList<>();
        deteList.add(begin);
        while(!begin.equals(end)) {
            begin = begin.plusDays(1);
            deteList.add(begin);
        }
        List<Integer> newOrderList = new ArrayList<>();
        List<Integer> totalOrderList = new ArrayList<>();

        for (LocalDate date : deteList) {
            LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime= LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("beginTime", beginTime);
            map.put("endTime", endTime);
            Integer allOrders=orderMapper.countByMap(map);
            totalOrderList.add(allOrders);
            map.put("status", Orders.COMPLETED);
            Integer validOrders =orderMapper.countByMap(map);
            newOrderList.add(validOrders);
        }
        //计算总数
        Integer totalCount = totalOrderList.stream().reduce(Integer::sum).get();
        //有效总数
        Integer validCount = newOrderList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate=0.0;
        if(totalCount!=0){
            orderCompletionRate = validCount.doubleValue() /totalCount;

        }


        return OrderReportVO.builder()
                .dateList(StringUtils.join(deteList,","))
                .orderCountList(StringUtils.join(totalOrderList,","))
                .validOrderCountList(StringUtils.join(newOrderList,","))
                .totalOrderCount(totalCount)
                .validOrderCount(validCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 统计某个时间段的排名前10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {

        LocalDateTime beginTime= LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime= LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");
        String numberList = StringUtils.join(numbers, ",");


        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }


}
